EP0697990B1 - Cantre - Google Patents

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Publication number
EP0697990B1
EP0697990B1 EP94914467A EP94914467A EP0697990B1 EP 0697990 B1 EP0697990 B1 EP 0697990B1 EP 94914467 A EP94914467 A EP 94914467A EP 94914467 A EP94914467 A EP 94914467A EP 0697990 B1 EP0697990 B1 EP 0697990B1
Authority
EP
European Patent Office
Prior art keywords
yarn
yarn package
creel
flexible elongate
pulley
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94914467A
Other languages
German (de)
English (en)
Other versions
EP0697990A1 (fr
Inventor
Colin Philip Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0697990A1 publication Critical patent/EP0697990A1/fr
Application granted granted Critical
Publication of EP0697990B1 publication Critical patent/EP0697990B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
    • B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • This invention relates to a creel having rotating yarn packages.
  • Yarns are arranged to be drawn from yarn packages on a creel under tension, the tension arising because the yarn packages are rotated against a force, commonly supplied by a strap or cord and pulley arrangement.
  • the tension is not required to be high and as a result, when the machine or beam which is being supplied by the creel stops, the yarn packages may continue to rotate for a period, during which time the yarns continue to unwind, leading to the yarns dangling loosely within the creel. This can lead to problems, such as entanglement, which can delay start up of the machine.
  • CA-A-898225 discloses a device which permits simultaneous collective adjustments to be made in the let-off tensions of creel bobbins.
  • Each bobbin has a let-off device including a drum and band wrapped part-way around the drum, the tightness of the band around the drum being determined by the yarn tension.
  • the let-off devices may be commonly controlled, and individually controlled.
  • a creel having a plurality of yarn package holders of the rotating type, each yarn package holder having a pulley and a flexible elongate member wound at least once around the pulley, each yarn package holder having a mechanism which responds to loss of tension in the yarn being drawn from a yarn package on the yarn package holder, to tighten the flexible elongate member around the pulley, to effect braking.
  • brake denotes the relatively high force applied to the yarn package by the flexible elongate member, when it has been tightened, which stops the yarn package holder.
  • the mechanism for each yarn package holder comprises a pivoted member which comprises a braking control arm extending transversely with respect to a yarn being drawn from a yarn package located on the yarn package holder.
  • the yarn runs under the braking control arm, in contact with it.
  • the flexible elongate member is secured to the pivoted member.
  • the braking control arm is raised by the yarn, which runs straight, or without substantial deviation, beneath it. In this condition the flexible elongate member is not tight around the pulley.
  • the braking control arm drops and thereby turns the pivoted member as a whole. This has the effect of tightening the flexible elongate member around the pulley, to brake the yarn package holder, and hence arrest the yarn package.
  • the pivoted member has a horizontal pivot, and the braking control arm, and the securement position of the flexible elongate member, are located to either side of the pivot.
  • one end of the flexible elongate member is secured to the pivoted member, and the other to a fixed part of the creel.
  • the yarn being drawn from a yarn package is tensioned wholly or mainly by the pivoted member, which has to be lifted by the yarn in order for the yarn package holder to rotate.
  • the pivoted member may be provided with an adjustable counterweight, and/or be subject to an adjustable spring force (as described further hereinafter), so that the yarn tension during normal running is adjustable.
  • Each yarn package holder may have a frame member associated with it.
  • the frame member may have parallel bars extending substantially parallel to the axis of the yarn package holder, which may be spanned by two adjustable cross members.
  • the yarn may be drawn above the front bar of the frame member.
  • the frame member may define a bounded area through which the yarn may be drawn; correct positioning of the cross-members prevents the yarn from falling off the end of the yarn package.
  • a bar of a frame member may serve as a post about which a yarn may be run, to change its direction. This may be useful if it is wished to employ a vertical yarn take-off system, as described in our PCT Patent Application No. PCT/GB92/00090, which is incorporated herein by reference.
  • the frame member may suitably be a U-shaped member retained above its yarn package, having the ends of its limbs, which serve as the said bars, secured to a fixed member.
  • the pivoted member may be pivotally mounted.
  • one end of the flexible elongate member may be secured.
  • One such fixed member may suitably carry two U-shaped members and pivoted members, one on each side, for respective yarn packages.
  • the pivoted member may be biassed by a spring, which is also secured to a column which may be displaced substantially vertically, thereby to commonly adjust the spring forces of all the springs attached to the column. All of the columns are, in their turn, commonly controlled by a single substantially horizontal control member.
  • the springs may be attached to adjustable substantially horizontal members which are, in their turn, commonly controlled by a single substantially vertical control member.
  • the extent to which the flexible elongate members needs to be wound around the pulley depends on the nature of the flexible elongate member and of the pulley. Empirically it is found that in order for a yarn package to be arrested when the flexible elongate member is tightened, it should be wound at least once around the pulley. Preferably, the flexible elongate member is wrapped around the pulley for at least 540°.
  • the flexible elongate member may suitably be a braided polymeric cord and the pulley, a plastics moulding. Alternatively the flexible elongate member could be a flat belt or a resilient metal strip, optionally having a friction material on its contact surface.
  • the pulley could be metallic, for example produced as a casting or spinning.
  • Each drawing shows a yarn package of a creel, the yarn package being mounted on a rotatable yarn package holder, and its associated tensioning/braking mechanism.
  • the other rotating yarn packages of the creel are not shown, but each has its own, identical, tensioning/braking mechanism.
  • a yarn package 2 of the rotating type mounted on a yarn package holder or spindle for rotation about a horizontal axis, on a vertical support column 4 of the creel.
  • a mounting plate 6 secured transversely to the vertical column 4 is a mounting plate 6, set in a vertical plane.
  • a pivoted member 8 Pivoted to this is a pivoted member 8, and secured fixedly to the plate 6 is a generally U-shaped member 10, of round bar form, which extends over the yarn package, with the limbs of the U-shaped member being parallel to the axis of the yarn package.
  • the pivoted member 8 comprises a braking control arm 12 of round bar form secured to, and extending transversely from, end 13.
  • the arm 12 is L-shaped. Its portion 14 which contacts the yarn 8 is parallel to the axis of the yarn package, and is approximately the same length as the yarn package. From this portion 14 extends a downturned portion 16.
  • a braided nylon cord 20 Secured towards the other end of the pivoted member 8, to the other side of the pivot 18 from the arm 12, is one end of a braided nylon cord 20.
  • the other end of the cord 20 is secured to the front limb of the U-shaped frame 10. In between, the cord extends approximately 11 ⁇ 2 times or more around a plastics moulded pulley (not shown) secured to the inner end of the yarn package.
  • a helical spring 22 has one end secured to a part carried on an end of the pivoted member (the end opposite to the end from which extends the braking control arm 12). The other end of the spring is secured to a column 24 which is adjustable up and down, thereby to adjust the biasing of the pivoted member provided by the spring.
  • the U-shaped frame 10 optionally has, secured across its parallel limbs, two cross-members 26, these being formed of wire with hook formations at their ends.
  • the cross-members may be located in any desired position between the limbs and, together with the limbs, define an area through which the yarn must be drawn from the yarn package. By this means, it is possible to constrain the yarn within the winding transverse length in order to prevent the yarn from falling off an end of the yarn package, during unwinding.
  • the cross-members may be placed close together, or far apart, depending on the geometry of the yarn package and characterisation of the unwinding material.
  • the yarn drawn from the yarn package runs over the front limb of the U-shaped frame 10 and under the braking control arm 12. It then runs over the rear limb (not shown) of the U-shaped frame immediately in front of it.
  • the yarn is drawn from the yarn package, against a moderate tensioning force arising mainly or wholly from the pivoted member 8.
  • the yarn acts on the arm 12, so that the latter is lifted to a raised position, against its weight and against the force of the spring 22, the yarn running generally straight, or with slight deviation, beneath it.
  • the end of the pivoted member opposite to the arm 12 is thus in a lowermost position, so that the cord is loose around the pulley, so that it provides no or very little tensioning force.
  • the arm has to be lifted only slightly for the "brake" to be released.
  • the yarn tension will then counteract the forces urging the arm to its lowest position, and will thus lift the arm further until there is a balance of forces between the yarn tension and the downward force of the arm.
  • the arm has a continuous up and down movement as the opposing forces strive to remain in balance.
  • the cord is wrapped loosely around the pulley but is not significantly affecting the unwinding tension.
  • Fig. 2 The embodiment shown in Fig. 2 is similar to the embodiment shown in Fig. 1, the main differences being:
  • the pulley 36 can be seen at the inward end of the yarn package.
  • the invention described herein may be used with a vertical take-off and guide system, as described in our above-mentioned PCT patent application.
  • Limbs of U-shaped members may be used as posts, about which a change in yarn travel direction is effected.
  • a yarn for a given yarn package is suitably diverted upwards about the rear limb of the U-shaped frame associated with the yarn package immediately in front; and special posts may be provided for the frontmost yarn packages of the creel.

Landscapes

  • Warping, Beaming, Or Leasing (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

Chaque dispositif de retenue d'une bobine de fil d'un cantre possède un mécanisme qui permet de stopper rapidement le dispositif de retenue de la bobine de fil quand le fil n'est plus tendu. Le mécanisme comprend un élément pivotant (8), une extrémité qui supporte un bras de commande de frein transversal (14) qui passe par-dessus le fil, et dont l'autre extrémité est fixée à une extrémité de corde de tensionnage (20) enroulée autour d'une poulie sur le dispositif de retenue de la bobine de fil. Lorsque le fil est sous tension, le bras de commande de frein (14) se soulève et ceci a pour effet de desserrer la corde (20) autour de la poulie, de façon à réduire l'effet de freinage. Lorsque le fil n'est plus tendu, le bras de commande de frein (14) s'abaisse. Ceci a pour effet de serrer la corde (20) autour de la poulie et de stopper rapidement le dispositif de retenue de la bobine de fil.

Claims (11)

  1. Cantre muni d'un certain nombre de porte-bobines de fil du type rotatif, chaque porte-bobine de fil comportant une poulie et un élément allongé flexible (20) enroulé au moins une fois autour de la poulie, chaque porte-bobine de fil comportant un mécanisme qui répond à une perte de tension dans le fil en cours de traction à partir d'une bobine de fil (2) sur le porte-bobine de fil, de manière à serrer l'élément allongé flexible autour de la poulie pour produire un freinage.
  2. Cantre selon la revendication 1,
    dans lequel
    le mécanisme destiné à chaque porte-bobine de fil comprend un bras de commande de freinage (12) s'étendant transversalement par rapport à un fil en cours de traction à partir d'une bobine de fil (2) placée sur le porte-bobine de fil, le fil passant au-dessous du bras de commande de freinage (12), en étant en contact avec celui-ci, le fil contrôlant la position du bras de commande de freinage qui commande à son tour le serrage de l'élément allongé flexible (20) autour de la poulie.
  3. Cantre selon la revendication 2,
    dans lequel
    le bras de commande de freinage (12) s'étend transversalement à partir d'un élément pivotant (8) comportant un niveau généralement horizontal, l'élément allongé flexible (20) étant fixé à l'élément pivotant, le bras de commande de freinage (12) étant monté d'un côté du pivot et la position de fixation de l'élément allongé flexible (20) se trouvant du côté opposé du pivot.
  4. Cantre selon la revendication 3,
    dans lequel
    l'élément allongé flexible (20) peut être fixé à l'élément pivotant (8) dans une position sélectionnée le long de cet élément pivotant, du côté opposé du pivot.
  5. Cantre selon la revendication 3 ou 4,
    dans lequel
    l'élément pivotant (8) est muni d'un contrepoids réglable (32) et/ou se trouve poussé par un ressort (22).
  6. Cantre selon la revendication 3, 4 ou 5,
    dans lequel
    une extrémité de l'élément allongé flexible (20) est reliée à l'élément pivotant (8), et son autre extrémité est fixée à une partie fixe du cantre.
  7. Cantre selon l'une quelconque des revendications précédentes,
    dans lequel
    chaque porte-bobine de fil est associé à un élément de châssis (10) qui définit une zone à travers laquelle le fil peut être tiré.
  8. Cantre selon la revendication 7,
    dans lequel
    l'élément de châssis (10) comporte des barres essentiellement parallèles qui s'étendent essentiellement parallèlement à l'axe du porte-bobine de fil, les barres étant traversées par deux éléments transversaux (26) dont l'un au moins est réglable de façon que l'espacement entre eux soit réglable.
  9. Cantre selon la revendication 8,
    dans lequel
    l'élément de châssis (10) est en forme de U et porte deux éléments transversaux (26) réglables chacun sur l'élément de châssis.
  10. Cantre selon l'une quelconque des revendications précédentes, dans lequel
    des moyens sont prévus pour commander en commun la tension et/ou le freinage de toutes les bobines de fil du cantre.
  11. Cantre selon l'une quelconque des revendications précédentes,
    dans lequel
    l'élément allongé flexible (20) est enroulé autour de la poulie sur au moins 540°.
EP94914467A 1993-05-06 1994-05-05 Cantre Expired - Lifetime EP0697990B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9309305 1993-05-06
GB939309305A GB9309305D0 (en) 1993-05-06 1993-05-06 Creel
PCT/GB1994/000970 WO1994026646A1 (fr) 1993-05-06 1994-05-05 Cantre

Publications (2)

Publication Number Publication Date
EP0697990A1 EP0697990A1 (fr) 1996-02-28
EP0697990B1 true EP0697990B1 (fr) 1998-02-04

Family

ID=10735009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94914467A Expired - Lifetime EP0697990B1 (fr) 1993-05-06 1994-05-05 Cantre

Country Status (6)

Country Link
EP (1) EP0697990B1 (fr)
CN (1) CN1040193C (fr)
AU (1) AU6682894A (fr)
DE (1) DE69408449T2 (fr)
GB (1) GB9309305D0 (fr)
WO (1) WO1994026646A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6467511B2 (en) 2000-07-06 2002-10-22 Miliken & Company Selvage yarn tensioning apparatus and method
FR2882681B1 (fr) 2005-03-03 2009-11-20 Coriolis Composites Tete d'application de fibres et machine correspondante
CN100467688C (zh) * 2005-04-12 2009-03-11 洪桂焕 整经机径向退解筒子自停装置
FR2975335B1 (fr) 2011-05-20 2013-05-17 Coriolis Composites Attn Olivier Bouroullec Machine d'application de fibres avec tubes flexibles d'acheminement de fibres munis de lames flexibles
FR3043010B1 (fr) 2015-10-28 2017-10-27 Coriolis Composites Machine d'application de fibres avec systemes de coupe particuliers
FR3048373B1 (fr) 2016-03-07 2018-05-18 Coriolis Group Procede de realisation de preformes avec application d'un liant sur fibre seche et machine correspondante
FR3051710B1 (fr) * 2016-05-26 2019-04-05 Coriolis Group Machine d’application de fibres continues comprenant un dispositif de freinage dispose dans la tete d’application et procede mettant en œuvre une telle machine
FR3056438B1 (fr) 2016-09-27 2019-11-01 Coriolis Group Procede de realisation de pieces en materiau composite par impregnation d'une preforme particuliere.
WO2018220063A1 (fr) * 2017-05-30 2018-12-06 Philip Morris Products S.A. Procédé et kit de déroulement d'une feuille de matériau enroulée en une bobine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE397129C (de) * 1924-11-14 Guido Horn Spulmaschine mit Fadenfuehler
CH236864A (de) * 1943-06-18 1945-03-15 Micafil Ag Einrichtung zur Aufrechterhaltung eines zulässigen Drahtzuges bei Spulenwickelmaschinen.
FR1369072A (fr) * 1963-08-30 1964-08-07 Ostermann Fa W & M Dispositif délivreur pour bobinoirs de fils métalliques
FR1445427A (fr) * 1965-08-27 1966-07-08 Siemens Ag Dispositif de freinage, en particulier pour des tambours ou bobines servant à recevoir le matériau d'enroulement ou de câblage lors de la fabrication de câbles électriques
CA898225A (en) * 1968-08-15 1972-04-18 The St. Lawrence Engine Co. Limited Multiple tensioning device
US3731889A (en) * 1971-02-01 1973-05-08 Alexeff Snyder Ets Tensioning apparatus
GB1413446A (en) * 1974-02-06 1975-11-12 Vnii Iskusstvennogo Volokna Twisting machine for producing twisted yarn from two strands

Also Published As

Publication number Publication date
WO1994026646A1 (fr) 1994-11-24
CN1040193C (zh) 1998-10-14
CN1125429A (zh) 1996-06-26
AU6682894A (en) 1994-12-12
GB9309305D0 (en) 1993-06-16
EP0697990A1 (fr) 1996-02-28
DE69408449T2 (de) 1998-07-30
DE69408449D1 (de) 1998-03-12

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